/*******************************************************************************
* Copyright (c) 2006, 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation
*
******************************************************************************/
package org.eclipse.persistence.jpa.internal.jpql;
import org.eclipse.persistence.jpa.jpql.TypeHelper;
import org.eclipse.persistence.jpa.jpql.spi.IType;
import org.eclipse.persistence.jpa.jpql.spi.ITypeDeclaration;
/**
* This {@link Resolver} is responsible to calculate the type based on the type of the state field.
*
* @version 2.3
* @since 2.3
* @author Pascal Filion
*/
final class SumFunctionResolver extends Resolver {
/**
* Creates a new <code>SumFunctionResolver</code>.
*
* @param parent The parent {@link Resolver}, which is never <code>null</code>
*/
SumFunctionResolver(Resolver parent) {
super(parent);
}
/**
* {@inheritDoc}
*/
@Override
public void accept(ResolverVisitor visitor) {
getParent().accept(visitor);
}
/**
* {@inheritDoc}
*/
@Override
IType buildType() {
IType type = getTypeDeclaration().getType();
TypeHelper helper = getTypeHelper();
// Integral types: int/Integer, long/Long => the result is a Long
if (helper.isIntegralType(type)) {
return helper.longType();
}
// Floating types: float/Float, double/Double => the result is a Double
if (helper.isFloatingType(type)) {
return helper.doubleType();
}
// BigInteger, the result is the same
IType bigIntegerType = helper.bigInteger();
if (type.equals(bigIntegerType)) {
return bigIntegerType;
}
// BigDecimal, the result is the same
IType bigDecimalType = helper.bigDecimal();
if (type.equals(bigDecimalType)) {
return bigDecimalType;
}
// Anything else is an invalid type
return helper.objectType();
}
/**
* {@inheritDoc}
*/
@Override
ITypeDeclaration buildTypeDeclaration() {
return getParentTypeDeclaration();
}
}